Esegui le operazioni ed esprimi i risultati in notazione scientifica:
a. $1,7 \times 10^{-3}+4,2 \times 10^2+862$
b. $10^{-1}-10^{-2}+2,65$
c. $3,5 \times 10^4 \times 2,9 \times 10^6-5,78 \times 10^2$
d. $7,25 \times 10^8: 2,01 \times 10^5+\left(11 \times 10^3\right)^2$
$$
\left[1,3 \times 10^3 ; 2,7 ; 1,01 \times 10^{11} ; 1,21 \times 10^8\right]
$$
38
punti
Livello 0
==========================================================
a) $0,0017+420+862 ≅ 1282 ≅ 1,3×10^3$.
b) $0,1-0,01+2,65 = 2,74 ≅ 2,7$.
c) $(3,5×2,9)(10^{4+6}-578$ =
= $10,15×10^{10}-578$ =
= $1,015×10^{11}-578 ≅ 1,01×10^{11} $.
d) $\dfrac{7,25}{2,01}×10^{8-5}+11^2×10^{3×2}$ =
= $3,607×10^3+11^2×10^6$ =
= $3607+121×10^6 = 121003607 = 1,21×10^8$.
68268
punti
Genius I
